I've been reading into vga output using an AVR controller and was a bit disappointed by the low resolutions available, seemingly due to the low speed available to a microcontroller. The thought occurred then about outputting in DVI-D which theoretically could output in a high resolution using the same controller. Unless I'm understanding the DVI spec wrong.
Well it's to do, as I understand, the clock speed of the avr is limited to 1uS per assembly instruction. That coupled with a lack of decent vga controllers, makes vga-output pretty though.